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What Is Least Count Of Steel Rule

A scale is a measuring system used by architects and engineers to help them draw on a scale that is not full size. To measure real sizes, a law... View Article

What Is The Half Deflection Method

An electromechanical device used to detect and show an electric current is a galvanometer. A galvanometer acts as an actuator in response to... View Article

How Does Ionic Bonding Work

The full transition between atoms of valence electron(s) is ionic bonding. It is a type of chemical bond that produces two ions with opposite... View Article

How Many Atoms Do Carbon Have

The value of the mole in precisely 12 grammes of pure carbon-12 is equal to the number of atoms. 12.00 g C-12 = 1 mol C-12 atoms = 6.022 x 1023... View Article

Is Liquid Polymer Toxic

Polymers are substances which are made up of long molecular chains. The long chains give them both solid and liquid properties. As the most... View Article

Is Gravity The Opposite Of Entropy

Between the planets and the sun, no repulsion occurs. To sustain circular movement, you need to apply a centripetal force on a moving object, and... View Article

Is Reverse Entropy Possible

It is not possible to reverse entropy in a closed system. Therefore, as changes between events progress, all closed systems over time will tend... View Article

Suppose X Follows A Binomial Distribution With Parameters N And P Where 0p1 If Pxrpxnr Is Independent Of N And R Then

1) p= 1/2 2) p= 1/3 3) p= 1/4 4) None of these Solution: Option (1) p= 1/2 Given that, P(X=r)/P(X=n-r) P(X=r)/P(X=n-r) = [... View Article

A Fair Coin Is Tossed N Times Let X Be The Number Of Times Head Is Observed If Px 4 Px 5 And Px 6 Are In Hp Then N Is Equal To

1) 7 2) 10 3) 14 4) None of these Solution: Option (4) None of these None of the values of “n” mentioned above will not satisfy the... View Article

One Hundred Identical Coins Each With Probability P Showing Up Heads Are Tossed Once If 0 P 1 The Probability Of Heads Showing On 50 Coins

1) 1/2 2) 49/101 3) 50/101 4) 51/101 Solution: Option (4) 51/101 Assume that x be the number of coins which shows head Let X be a... View Article

If From Each Of The Three Boxes Containing 3 White And 1 Black 2 White And 2 Black 1 White And 3 Black Balls One Ball Is Drawn At Random

1) 13/32 2) 1/4 3) 1/32 4) 3/16 Solution: Option (1) 13/32 The probability that two white and one black ball = P(W1W2B3) +P(W1B2W3)+... View Article

A Pack Of Playing Cards Was Found To Contain Only 51 Cards If The First 13 Cards Which Are Examined Are All Red Then The Probability

1) 1/3 2) 2/3 3) 1/2 4) 25C13/51C13 Solution: Option (2) ⅔ Let X be the event that the missing card is black, and Y be the event... View Article

Let P Denotes The Probability That A Man Aged X Years Will Die In A Year The Probability That Out Of N Men A1 A2 A3 An Each Aged X A1

1) 1/n [1-(1-p)n] 2) [1-(1-p)n] 3) [1/(n-1)] [1-(1-p)n] 4) None of these Solution: Option (1)1/n [1-(1-p)n] Given that, p be the probability... View Article

A Box Contains 100 Tickets Numbered 1 2 100 Two Tickets Are Chosen At Random It Is Given That The Maximum Number On The Two Chosen

1) ⅛ 2) 13/15 3) 1/7 4) None of these Solution: Option (4) None of these It is given that the maximum number on the two chosen... View Article

For The Three Events A B And C P Exactly One Of The Events A Or B Occurs Pexactly One Of The Events B Or C Occurs Pexactly One Of The Events

1) (3p+2p2)/2 2) (p+3p2)/4 3) (p+3p2)/2 4) (3p+2p2)/4 Solution: Option (1) (3p+2p2)/2 P (exactly one of the events A or B occurs) =... View Article

A Student Appears For Test I Ii And Iii The Student Is Successful Is He Passes Either In Test I And Ii Or Test I And Iii Probability That Student

1) p=1, q=0 2) p=⅔, q= 1/2 3) There are infinitely many values of p and q 4) All of the above Solution: Option (4) all of the above.... View Article

Two Dice Are Thrown Simultaneously The Probability That Sum Is Odd Or Less Than 7 Or Both Is

1) 2/3 2) 1/2 3) 3/4 4) ⅓ Solution: Option (3) ¾ The required probability = P(sum is odd) + P(sum less than 7) - P(both) P(odd)... View Article

A Pair Of Fair Dice Is Rolled Together Till A Sum Of Either 5 Or 7 Is Obtained Then The Probability That 5 Comes Before 7 Is

1) 1/5 2) 2/5 3) 4/5 4) None of these Solution: Option (2) ⅖ Let A be the event that the sum 5 occurs B be the event that the sum 7... View Article

If A Party Of N Persons Sit At A Round Table Then The Odds Against Two Specified Individuals Sitting Next To Each Other Are

1) 2:(n-3) 2) (n-3):2 3) (n-2):2 4) 2: (n-2) Solution: Option (2) (n-3):2 The number of ways, in which “n” number of persons sit in... View Article

A Five Digit Number Is Formed By Writing The Digits 1 2 3 4 5 In A Random Order Without Repetitionsprobability That Number Is Divisible By 4 Is

1) 3/5 2) 18/5 3) 1/5 4) 6/5 Solution: Option (3) 1/5 Total cases = 5! The number is divisible by 4, if the last two digits of the... View Article

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